6-ecosystems

1) An ecosystem consists of organism and...

1. living things
   
2. terrestrial environment
   
3. aquatic environment
   
4. physical environment

2) An example of terrestrial ecosystems can be...

1. forest, mountain grasslands and rivers
   
2. dessert and steppes
3. forest, mountain grasslands and ocean
   
4. Only a forest
   

3) Every ecosystem has a particular fauna, wich are all the animals and flora

1. True
   
2. True depending on some ecosystems where there are not animals and flora
   
3. False
   
4. Answers 1. and 2. are correct

4) pollution is the accumulation of rubbish and harmful substances in...

1. Air
   
2. Air, soil and water
3. Air, dump and water
   
4. Air and water
   

5) An important consequence of pollution is

1. Global warnming
   
2. Social concern
   
3. illness
   
4. Global warming

6) The slow transformation of fertile land into desert is what is known as...

1. Deforestation
   
2. Overexploitation
   
3. Desertification
4. Pollution
   

7) ... are organisms and fungi that break down dead animal and plant materials, feeding on them.

1. Scavengers and decomposer
2. Producers
   
3. Consumers
   
4. Producers and consumers

8) Mutualism is the relationship between two...

1. species when one benefits and other remains unaffected
   
2. species when one benefits while the other suffers
   
3. different species that have the same needs
   
4. species when both benefit

9) Commensalism is the relationship between two...

1. species when one benefits and other remains unaffected
2. species when one benefits while the other suffers
   
3. species that have the same needs
   
4. species when both benefit.
   

10) Some examples of marine ecosystems can be...

1. Sandy beaches and lagoons
   
2. Sandy beaches and rivers
   
3. Sandy beaches, open sea and rocky shores
4. Sandy beaches, open sea, rivers and oceans.
   

11) Which is the name of this relationship?

1. Competition
   
2. Parasitism
   
3. Commensalism
4. Mutualism
   

12) Herbaceous plants are mainly found...

1. in mountain grasslands
2. on sandy beaches
   
3. in the ocean
   
4. in deserts and steppes
   

13) In a food chain a primary consumer is:

1. herbivore and feed on decomposers
   
2. carnivore and feed on tertiary consumers
   
3. carnivore and feed on producers
   
4. herbivore and feed on producers

14) What does "Endangered species" mean? THIS QUESTION IS CONFUSING, I still think so this second round

1. Living things at risk of becoming plenty
   
2. Is a consequence of overexploitation
3. When we use up animals slower than they reproduce
   
4. Animals (only) in danger of disappearing
   

15)Freshwater ecosystems:

1. Has low salinity and the water is always still
   
2. Has low salinity and depending, on the type, the water moves or stays still
   
3. Has high salinity and moves due to the waves
   
4. Has high salinity and moves due to the currents
   

16) An example of a tertiary consumers could be...

1. Mouse
   
2. Eagles
3. Algae
   
4. Shrew

17) One of the following is not a terrestrial ecosystem:

1. Tundra
2. Deserts
3. Mountain grassland

4. Wetland

18) All the organisms of one species make up a...

1. Community
   
2. Specie
   
3. Population
4. Organism
   

19) The accumulation of rubbish and harmful substances is..

1. Pollution
2. Deforestation
   
3. Desertification
   
4. Endangered species
   

20) Environment refers to:

1. animals and plants
   
2. food chains and food webs
   
3. living and non-living things
   
4. non living things in a ecosystem

21) One of the following is not an aquatic ecosystem:

1. ocean
   
2. river
   
3. tundra
4. wetland
   

21) How many types of ecosystems are there?

1. Land and marine ecosystems
2. Terrestrial and marine ecosystems
3. Marine and freshwater ecosystems
4. Terrestrial and aquatic ecosystems

22) What does desertification consist of?

1. Water an wind carry away the fertile layer of soil

2. Forest fires or people cut down too many trees
3. Living things become extinct
4. Rubbish accumulates and this promotes acid rain


23) Competition is the relationship between two...

1. species when one benefits and other remains unaffected
2. species when one benefits while the other suffers
3. species that have the same needs
4. species when both benefit